Sea & Sea DX Macro Port 87

Macro port designed for;Canon EF100mm IS USM / EF 100mm F2.8 Macro USM,AF-S VR Micro Nikkor ED105mm F2.8G (IF) / AF-S DX Micro Nikkor 85mm F3.5G ED VR.
This port accommodates listed lenses without an additional port base or extension ring. Port has an M67 screw mount.
[Dimensions (DIAxD)] 128×120.5mm / 5.0×4.7inches
[Weight] Approx. 505g / 17.8 oz
[Depth rating] 100m / 330ft
[Construction] Corrosion-resistant aluminium alloy (anodized, anti-reflection coating on the inner surface)
[Distance] Between the port mount and inner glass surface: 87mm / 3.4 inches